100. Two parallel plates of 2 ∙ 10−2 m2 each, located in the air, are charged with unlike charges of 1 ∙ 10−7 C. What work must be done to increase the distance between the plates by 1 ∙ 10−4 m? The dielectric is air.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)